Stamping machine



March 25 1930. c. DE YOUNG STAMPING MACHINE Filed Aug. 11, 1928 Jazz/67%;. krw fidzzy i not injure his hands.

Patented Mar. 25, 1930 UNITED-STATES P T E T OFFICE CHRIST DE YOUNG OF CHICAGO, ILLINOIS, ASSIGNOR TO INTERNATIONAL HARVESTER COMPANY, A CORPORATION OF NEW JERSEY V srAMPrne MACHINE Application filed August 11, 1928; Serial No. 298,968.

This invention relates to an improvement in stamping machines or punch presses.

The particular improvement is in a feeding mechanism for regulating the feed of the work to be operated upon, the same includ-.

ing safety mechanism for preventing injury by the stamping or punching element to the operators hand. I I

The objects of the invention are to provide in' such machines having a feed table, a means for holding a piece of Work tobe stamped or punched in its work holding position, and a second meanscontrollable by the feed of a succeeding piece of work to release the holding means, the purpose of such mechanism being to make it unnecessary for the operator, when feeding work, to get his hand into a position where it might be injured by the stamping or punching member. Another object is to provide an obstructer element whichwillprevent a careless operator from getting'his hand injured. Other objects should be apparent as the disclosure progresses;

Briefly, these desirable objects are accom- 2 plished by the structure of this invention,

which generally comprises in the combination with a stamping or vpunching machine having a stamping-or punching elementand a feed -table, of means defining a passageway along said table for the work, and interrelated hold ing and releasing means adjacent said passag'e-wayfor controlling the feed of work through the passageway-to punching position in such'amanner that the operator need An ob'structer element is also provided, which doubly insures the operatorshand againstinjury. I

Referring now to the drawingsshowing an illustrative embodiment of this invention,

'40 it will be seen that,-'- a Figure 1 is a general side elevational View of a standard stamping machine or punch press; 7 .7

Figure 2 is a detail plan view, partly in section, of the feed table, the feed passage-way,

the hold and releasing means, and the obstructer of this invention; 7 I Y 1 Figure 3 1s a detail front elevational view in reduced scale ofthe structure shown in Figure 2; and w I Figure 4 is a general side elevationalview of the holding and releasing means of this invention adjacent the feed passage-way, as viewed substantially along the line44 of Figure 2.

For the sakeof illustration a conventional stamping machine has been shown which, as

seen in Figure 1, comprises legs 10, a body 11,

an inclined feed table 1, a punch or stamping element 13, and means 14 generally indi- 'cated for reciprocating the punch element 13 to and from stamping position as is well known 1n this art.

The table 12, as best shown in Figures 2 and 3, carries a pair of guide members 14 and 15 arranged in parallelism and spaced apart to form a work feeding passage-way 16 open at each end, as shown, so that a piece of work shown at 17 maybe slid by hand therethrough to a position on the table, where it' Will slide into the path of movement of the punch element 13 to be punched or stamped. In the form of this invention herein shown, the thoughtis to stamp a trademark or other designation on the Figure 2. v P The guide 15 is in the form of an upper plate 15* and a lower plate 15 spaced apart by a pin 18 at one end and another pin 19 at the other'en dt This spaced apart arrangement'of the plates 15 and 15 forming the guide element 15 leaves a chamber in which is pivotallymounted on the pin 19 a lever.

'20 having a leg 21 and a' holding projection 22, said lever being normally pressed out by a piece of work, as'indicated in spring 23 to a position causing the projection '22.to extend into the passage-way for the purpose of holding the piece of work 17 in stamping position on the'tjable, as shown in the full lineposition in Figure 2. At the entrvendof the passage-Way, the guide 15 carries, pivotally mounted on the pin 18, a isimil-ar lever 24. which -includes a projection 25 and a leg 26, said projection-25 normally extending into the passage-way 16 because the spring pressed leg 21 of the lever 20-normal- 1y urges the leg 26 of the lever 24 inthat direc tion, as will be'clear, and asshowninthefull g line position inFigure 2. 1A stop pin 27 is ',-provided forthe lever 20 to-limit its outward movement and a similar stop pin 28 is provided for the lever 24: to limit the outward movement of this lever.

Bolts 29 serve to secure the guides 14 and 15 securely to the table. One of the guides, as for example the guide 1 1, carries on a post30 an obstructer in the form of an arm 31, which can be adj ustably swung into several positions by means of a nut 32 to cause said arm 31 to assume any desired position across the passage-way 16 with respect to the work 17 to be stamped, so that an operator cannot get his hand into the path of movement of the punch or stamping element 13, as will be understood.

In'operat-ion, the operator slides a piece of work 17 past the projection or obstruction 25 on the lever 24, as the same will yield back to permit this passage of the work, said piece of work sliding down the table by gravity to the full line position shown in Figure 2, where the projection 22 of the lever serves to hold the work in a position to be operated upon by the stamping element 13, it being understood that the spring 23 normally holds the lever 20 and its projection 22 in a position to hold the work, as has just been described. After the work has been stamped, a succeeding piece of work shown in the dotted line position inFigure 2 at 17 is slid by hand down the passage-way, which work 17 will contact the projection 25 of the lever 2&,causingthe arm 26 of this lever to be pivoted inwardly and, as the arm 26 will obviously move the arm 21 also inwardly, the extension or projection 22 of the lever 20 will also fold inwardly to cause the piece of work 17, which has already been stamped, to be released and discharged. As soon as the piece 17 passes the extension 25 on the lever 24, the spring 23 causes the levers to move outwardly again, so'that the extension 22 will again be in work holding position. In this manner succeeding pieces of work are fed through :the passage-way, the pivoted levers serving to make it unnecessary for the operator to get his hand into the path of movement of the punch head.

In the event that the operator would be carelessin spite of this safety feed feature just described, it might be desirable that an obstructer in the form ofan arm 31 also be provided, as has been described, so that a positive means will be provided for making it impossible for an operator to gethis hand above the work 17 and in the path of the punch head.

From this description it must now be appreciated that an improvement has been provided for machines of the character described, which will make hand feeding in these machines safe for the operator, and that the 'invention accomplishes all of the desirable objectsin'this' respect heretofore recited.

7 It is the intention to cover all such changes and'modifications-of the .formof the invention herein described and illustrated as do not materially depart from the spirit and scope thereof as indicated in the following claims.

What is claimed as new is:

1. The combination with a stamping machine having a punch member and a work holding and feeding table including a work passage-way, of means at one side of the passage-way for holding a piece of work in position to be stamped by the punch member, and means at the same side of the passageway for releasing said holding means contrpiolled by a second piece of work fed along the ta le.

2. The combination with a stamping machine having a punch member and a work holding and feeding table, of pivoted means adjacent the path of movement of work on the table for holding a piece of work in position to be stamped by the punch member, and other pivoted means'on the same side of said path of movement and controlled by a second piece of work fed along the table to release said holding means. I 3. The combination with a stamping machine having a punch member and a work holding and feeding table including a work passage-way, of yieldably mounted means at one side of said passage-way for holding a piece of work in position to be stamped by the punch member, and other yieldable means at the same side of the passage-way for releasing said first means controlled bya second piece of work fed along the table.

4. The combination with a stamping machinehaving a punch member and a work holding and feeding table, of a pivoted lever at one side of the table including means for holding a piece of work in position to be stamped by the punch member, and a second pivoted lever at the same side of the table for releasing'the first lever.

5. The combination with a stamping machine having a punch'member and a work holding and feeding table, of a spring pressed pivoted lever including means for holding a piece of work in position to be stamped by the punch member, and means controlled by the feeding of a succeeding piece of work to move said lever to release the first piece of work. I V

6. The combination with a stamping machine having a punch member and a work holdingand feeding table, of a spring pressed pivoted lever including means for holding a piece of work in position to be stamped by the punch member, and a'second pivoted lever controlled by a succeeding piece of work to move the first lever to release the first piece of work. 7

' 7. The combination with a stamping machine having a punch member and a work holding and feeding table, of a lever atone side of'the table including means for holding a piece of work in position toibewstamped, a

second lever at the same side of the table engaging the first lever and controlled by the feed of a second piece of Work to move the first lever to release the first piece of work, and resilient means acting normally to keep the first lever in work holding position and the second lever in a position to act as a yieldable obstruction to the feed of a second piece of work.

8. The combination with a stamping machine having a punch member and a table, of guide members on the table spaced to form a work feedpassage-way, means in one of said guide members for holding piece of work in position to be stamped, and other means in one of said guide members controlled by the feed of a succeeding piece of work for moving said first means to release the first piece of work.

' 9. The combination with a stamping machine having a punch member and a table, of guide members on the table spaced to form a work feed passage-way, pivoted means in one of said guide members for holding a piece of work in position to be stamped, resilient 'means normally holding said means in said holding position, and another pivoted means in one of said guide members operable by the feed of a succeeding piece of work for moving said first pivoted means against the force of V the resilient means to release the first piece of work.

10. The combination with a stamping machine having a punch member and a table piece of Work fed along the table, andan obstructer element toprevent entry of an operators hand to a position in the path ofmovement of the punch memberr 14. The combination with a stamping machine having a punch member and a work holding and feeding table, of means for holding a piece of 'work in position; tozbe stamped by the punch member, means for releasing said holding means controlled by a second piece of work fed along the table, and an adj ustably mounted obstructer arm to prevent entry of an operators hand to a position Iion the path of-movement of the punch mem- In testimony whereof I aflix my signature.

CHRIST DE YOUNG.

including a work feed passage-way, ofa work I holding means adjacent said passage-way and releasing means adjacent said passageway for releasing the holding means, said releasing means being controlledby the en'- try of a succeeding piece of work into the feed I passage-way.

11. The combination with a stamping machine having a punch member and a table including a work feed passage-way, of a yieldable work holding means adjacent said passage-way, and yieldable releasing means adjacent said passage-way for releasing the holding means, said releasing means being controlled by the entry of a succeeding piece of work into the feed passage-way.

12. The combination with a stamping machine having a punch member and a table including a work feed passage-way, of a pair of yieldably and pivotally mounted levers adjacent said passage-way, said levers engaging each other, one of said levers having means for holdingwork in stamping position and the other lever having means engageable by a succeeding piece of work entering the feed passage-way to control the first lever to cause it to r'elease'the first piece-of work after it has been stamped. r I

13. Theco-mbination with a stamping ma- 

